Bug 2514224 (CVE-2026-67567)

Summary:	CVE-2026-67567 multicloud-operators-subscription: multicloud-operators-subscription: HelmRelease chart applied with controller SA without GVK or namespace restriction
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	gparvin, rhaigner
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in the multicloud-operators-subscription component. This vulnerability allows a tenant, who has the ability to create HelmRelease custom resources (CRs), to bypass existing security controls. The system's HelmRelease controller processes Helm chart templates using its own elevated ServiceAccount privileges without proper validation. This enables the tenant to deploy arbitrary resources across the entire cluster, leading to a significant security compromise.	Story Points:	---
Clone Of:		Environment:
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-11 17:38:19 UTC

A flaw was found in the multicloud-operators-subscription component of Red Hat Advanced Cluster Management (RHACM). The HelmRelease controller's NewManager() function builds Helm action.Configuration using the controller's own kubeconfig without impersonation or SubjectAccessReview. No GVK filter or namespace coercion is applied, allowing cluster-scoped or cross-namespace Helm chart templates to be applied with the controller's wildcard (*/*/*) ServiceAccount privileges. A tenant who can create a HelmRelease CR can achieve arbitrary resource deployment cluster-wide.

Upstream repo: https://github.com/stolostron/multicloud-operators-subscription
Audited commit: 48ae4defaa5b719e0664e1de7413c96029c938bc
Jira tracker: ACM-38623